JPH0316010Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a sizing device, and more specifically, it uses a feeding roller to feed the log vertically and pinch the log from the top, bottom, left and right with the tip of the measuring arm. , relates to a measuring device that automatically measures the diameter of a raw wood log based on the opening degree of the tip of its measuring arm.

[Prior art] Conventionally, this type of measuring device was developed by, for example,
There is one described in the -22964 publication.

This conventional technology includes two movable mechanical contacts placed in a liquid that cools a molten plastic body and facing each other in the diametrical direction of the plastic body, and a lever that extracts the movement of each contact out of the liquid. , a device for converting the movement of each of the levers into an electrical signal, and a device for adding the two electrical signals, respectively, to measure the outer diameter of the plastic structure.

[Problems to be Solved by the Invention] The above-mentioned conventional techniques are directed to plastic cables, sheaths, or pipes, which are all circular.

In particular, it is difficult to measure the diameter of logs that are not perfectly round using two mechanical contacts, and in addition, accurate measurements cannot be made due to the curvature of the logs.

By the way, in businesses that handle large quantities of raw logs, such as lumber industries, chip manufacturers, and log markets, it is necessary to "inspect" the logs and, in some cases, to sort and classify them by diameter or length. This is based on the diameter and length of the raw wood log, and in the past, workers measured the diameter and length of each log one by one with a ruler or by eye, and calculated the volume based on these dimensional values. They were also doing sorting and classification work.

Therefore, receiving inspection and sorting requires a lot of effort, and errors due to individual differences among workers are also included.
Accurate acceptance inspection results were not obtained.

In order to eliminate each of the above-mentioned problems, this idea involves installing a pair of measurement arms that open and close upward, downward, left and right, and a plurality of photoelectric switches that detect the amount of logs being transported, in conjunction with the log transport means. The purpose is to automate the measurement of logs that are not perfectly round and are curved.

[Means for Solving the Problems] The object of this invention described above is to provide an underframe, a plurality of feed rollers that are rotatably supported by the underframe and rotated in a predetermined direction by being each given a rotational force by an electric motor, and a plurality of A presser is located above the feed rollers, one end of which is pivotally supported by a bracket attached to the underframe, and the other end of which is pivoted by a swinging arm that can be freely swung by an air cylinder, and which presses the raw wood against each of the feed rollers. A roller, a frame whose lower end is pivotally supported and swingably attached to the feed side of the raw wood of the underframe, and an interlocking frame whose one end is pivotally supported by the frame and which is attached to the shaft. a first measuring arm that opens and closes vertically symmetrically with respect to each other using fan-shaped gears and closes symmetrically with respect to each other using an air cylinder installed between the shafts; a second measuring arm that opens symmetrically to the left and right when the shaft rotates in one direction, and closes symmetrically to each other by an air cylinder attached to the shaft; The air cylinder and the like are operated according to the progress position of the log, and a photoelectric switch instructs to read the measurement value, and a pulse signal corresponding to the opening/closing operation of the first and second measuring arms is generated. This is achieved by providing a pulse generator, respectively.

[Operation] The log measuring device of this invention starts the electric motor, operates the air cylinder on the swinging arm in the direction in which the presser roller opens, and similarly applies air in the direction in which the first and second measuring arms close. Operate the cylinder.

When the log is fed onto a plurality of feed rollers, a photoelectric switch detects the leading end of the log, and the air cylinder is operated so that the presser roller closes, thereby pressing the log onto the feed rollers.

A powerful feeding function is exerted on the log by this presser roller and the feed roller, and the log is sent from one side of the underframe to the other side.

As the log advances, the first and second measuring arms are pushed upward, downward, leftward, and rightward, respectively.

When the first and second measurement arms are pushed apart about the axis of the frame body, an interlocked pulse generator is operated and generates a pulse signal corresponding to the opening/closing operation of the measurement arms.

By measuring this pulse signal, the size of the log is measured. When a certain amount of logs have been sent out, a photoelectric switch detects the end of the log, and the first
Then, the air cylinder is operated to close the second measurement arm, and the air cylinder is operated to the swing arm to open the presser roller, thereby completing the measurement of the size of one log.

[Example] Examples will be described with reference to the drawings.

First of all, the basic structure of this invention, as shown in Figs. 1 and 2, is an underframe 1 constructed three-dimensionally from channel steel (rip channel steel), etc., and an electric motor 8 that is pivotally supported by this underframe 1. A plurality of feed rollers 4, 4 are each given a rotational force and rotate in a predetermined direction, and one end is attached to a bracket 9, 10 located above the plurality of feed rollers 4, 4 and attached to the underframe 1. Presser rollers 11 and 12 are supported on the other ends of swinging arms 13 and 14 that are supported on the shaft and can freely swing with air cylinders 17 and 18, and press the raw wood W against each of the feed rollers 4 and 4, respectively, as shown in the figure. to be placed.

A frame body 26 is pivotally supported at the lower end of the underframe 1 on the raw wood W feeding side and is swingably attached.
The shafts 28 and 29 are respectively supported at one end by shafts 28 and 29 on the frame body 26, and are opened and closed symmetrically up and down by mutually meshing sector gears 34 and 35 attached to the shafts 28 and 29. First measuring arms 32, 33 are arranged as shown, which are closed symmetrically to each other by an air cylinder 38 installed between them.

Further, one end of each of the shafts 48 and 49 is supported by the frame 26, and when the shafts 48 and 49 are rotated in one direction, the shafts 48 and 49 open left and right symmetrically.
Air cylinder 57,5 attached to 8,49
a second measuring arm 5 which closes symmetrically to each other at 8;
2,53 will be installed.

Further, a photoelectric sensor disposed in the direction in which the feed rollers 4, 4 are lined up operates the air cylinders 17, 18, 38, 57, 58, etc. according to the advancing position of the raw wood W, and instructs the reading of measurement values. switches 70a, 70b to 73a, 73b, and the first
and second measurement arm 32, 33, 52, 53
It is configured with pulse generators 39, 62, and 67 that generate pulse signals corresponding to the opening/closing operations.

Next, the specific structure of the entire size measuring device of this invention will be explained with reference to FIGS. 1 to 3.

A plurality of drum-shaped feed rollers 4, 4 each having a chain wheel 3 are rotatably mounted on an underframe 1 made of shaped steel by bearings 2 at a predetermined distance apart in the horizontal direction.

A chain 5 is attached to each of the chain wheels 3 to interlock them, and an electric motor 8 similarly attached to the underframe 1 causes the wheels 5 to drive a plurality of feed rollers 4 and 4 via chain wheels 6 and 7.
are configured to be able to rotate counterclockwise in FIG. 1, respectively.

A pair of brackets 9 and 10 are attached to one side of the above-mentioned underframe 1, and the bases of a pair of swing arms 13 and 14 are attached to the bases of a pair of swing arms 13 and 14, each of which has presser rollers 11 and 12 rotatably supported at their tips. The rod ends of the pair of air cylinders 17 and 18, which are swingably mounted by a pair of bearings 15 and 16 mounted on the brackets 9 and 10 and mounted on the upper part of the underframe 1, are connected to the swing arms 13 and 10, respectively. 14, and the swing arms 13, 14 are rotated by the operation of the air cylinder.
A pair of presser rollers 1 pivoted on the free ends of
1 and 12 are configured so that they can be easily opened and closed up and down.

Together with the plurality of feed rollers 4 described above, a raw wood feeding mechanism is formed.

As shown in FIG. 4, the swinging arm 13 of the presser roller 11 fixes the chain wheel 19 and the gear 20 to a common shaft, rotatably supports the chain wheel 19 and the gear 20, and attaches the swing arm 13 to the shaft of the presser roller 11. Attach the chain wheel 21.

Chain 2 is attached to both of these chain wheels.
Further, a proximity switch 23 is installed near the outer peripheral surface of the gear 20, and the proximity switch 23 repeats on and off operations in conjunction with the rotation of the presser roller 11, corresponding to the rotation of the presser roller 11. The device is configured to generate a pulse signal based on the following information.

As shown in FIG. 3, a bracket 24 constituting a part of the underframe 1 has a base portion of a frame body 26 that can freely swing around a shaft 25, and is connected to the shaft 25 and a bearing 2.
7, and shafts 28 and 29 passing through the frame body 26 in the horizontal direction are mounted with bearings 30 and 31, and measurement arms 32 and 33 that swing open and close in the vertical direction with these shafts 28 and 29 as reference points. respectively said shaft 2
It sticks to 8,29.

As shown in FIG. 1, sector gears 34 and 35 that mesh with each other are fixed to one ends of the shafts 28 and 29, so that the measurement arms 32 and 33 open and close symmetrically with each other, and the shaft 28 , 29 are fixed to the other ends of the levers 36 and 29.
2 and 33 are constructed so that they always act in the closing direction phasewise.

Further, the rotary shaft of the rotary pulse generator 39 is attached to a part of the frame 1 using a bearing 40, for example, so that both the outer case and the rotary shaft of the rotary pulse generator 39 can rotate freely. A chain wheel 41 is attached to the outer case of this pulse generator 39, and a chain wheel 42 is attached to the shafts 28 and 29, respectively.

Then, chains 44 and 45 are connected to chain wheels 42 and 43 fixed to the shafts 28 and 29, and the chains 44 and 45 are rotated in conjunction with each other. are constructed so that both rotate relative to each other.

Furthermore, by adding and counting the pulse signals generated by the pulse generator 39 using a generally well-known counter circuit, the pulse signal corresponds to the opening dimension (D) of the tip portions 46 and 47 of the measuring arms 32 and 33. The count value is obtained.

Next, the shafts 48 and 49 are attached to the frame 26 with the bearings 50 and 5.
A measuring arm 5 is rotatably mounted at 1 and swings open and close left and right about this axis as shown in Fig. 5.
The bases of the measurement arms 52 and 53 are fixed to the shafts 48 and 49, levers 54 and 55 are fixed to the shafts 48 and 49, and the bases of the measurement arms 52 and 53 are attached to the frame 26 by means of a fixture 56. Installed air cylinder 5
The rod ends of 7 and 58 are connected to the tips of the levers 54 and 55.

Further, the tips of the measuring arms 52 and 53 are actuated in a direction to close each other, and the shafts 48 and 49 are
Chain wheels 59 and 60 are fixed to the ends of the pulse generator 62, and the rotating shaft of the rotary pulse generator 62 is supported by a bearing 61 on the upper part of the frame 26. The outer case of 62 and the rotating shaft are both installed so that they can rotate freely.

Further, a chain wheel 63 fitted on the rotating shaft of the pulse generator 62 and a chain wheel 69 fixed to the outer case are connected to each other so as to rotate in conjunction with the chain wheels 59 and 60, respectively.
5 and 66, the measuring arm 52,
When the measurement arms 53 open and close, the rotating shaft of the pulse generator 67 and the outer case rotate relative to each other, thereby generating pulse signals corresponding to the opening and closing operations of the measurement arms 52 and 53.

By counting this pulse signal using a generally well-known counter circuit, a count value corresponding to the opening degree E of the tips 68, 69 of the measuring arms 52, 53 can be obtained.

In addition, the symbols 70a, 70b, 71a, 71 in the figure
Those shown by b, 72a, 72b and 73a, 73b are well-known photoelectric switches which are a combination of a light projector and a light receiver, and are operated sequentially as the log W advances.

The size measuring device of this invention is constructed as described above, and the operation of this device will be explained below in Figures 1 to 8a.
This will be explained using ~c.

The electric motor 8 is started, and the air cylinder 1 is moved in the direction in which the presser rollers 11 and 12 are opened while rotating the plurality of feed rollers 4 in the direction of arrow c shown in FIG.
7, 18 are operated, and the air cylinders 38, 57, 58 are operated so as to pressurize the measurement arms 32, 33 and 52, 53 in the closing direction, and the raw wood W is fed in from below the arrow F. The circuit is configured such that when the tip of the log reaches the position of the light emitter 71a and the light receiver 71b and the light receiver 71b is activated by blocking the light from the light emitter 71a, the air cylinder 17 presses the presser roller 11 in the direction of closing. Configure.

Then, the raw wood W is pressed by the presser roller 11 and rotated by the feed roller 4, which causes a powerful feeding mechanism to act, and the raw wood W continues to advance.

As the raw wood W advances, its tip portion continues to advance while pushing the measurement arms 32, 33 and 52, 53 apart in the left-right direction.

When the measuring arm is expanded by the raw wood W in this way, the pulse generator 3 linked to the measuring arms 32, 33 and 52, 53
9 and 67 rotate, respectively, and the measuring arm 3
2, 33 and 52, 53, and a counter circuit connected to each pulse generator 39, 67 adds or subtracts the pulse and calculates the value at the tip of the measuring arm. The opening degrees of 46, 47 and 68, 69 are numerical values corresponding to the diameter dimension of the log W at that time.

The log W continues to advance, and its tip is the floodlight 72
a, reaches the position of the light receiver 72b, and the light emitter 72a
When the light receiver 72b operates by blocking the light, the counted value is read by an appropriate circuit and recorded, thereby obtaining a value that is a two-dimensional measurement of the diameter of the tip of the log W.

The diameter of a circle is expressed as the distance between two points where an arc intersects a straight line passing through the center of the circle, and when measuring the diameter of a circle, it must be measured on a straight line passing through the center of the circle.

However, conveyors or feed rollers, which are commonly used means of transporting logs, have a fixed height. Furthermore, logs, which are natural materials, vary in thickness, which makes it difficult to use conveyors with a fixed height. Alternatively, when the log is placed on the feed roller, the center point of the cross section of the log also moves up and down as the diameter changes.

This means that in the device according to this invention, the measuring arms 32 and 33, which act to sandwich the log from above and below according to the size of the log, are connected to the sector gear 34,
The frame body 26 to which the measurement arms 32, 33 and 52, 53 are attached can freely swing around the shaft 25, The tips 68, 69 of the measuring arms 52, 53, which act in the direction of sandwiching the log from the left and right, also move up and down according to the size of the log, and the tips 4 of the measuring arms 32, 33 in the vertical direction
6, 47, that is, on the line X=X' where Y=Y' as shown in FIGS. 8b and 8c, opening and closing operations are performed in the left-right direction.

This means that regardless of the size of the log W, the log is always held between the measuring arms 32, 33 and 52, 53 on a line passing through the center point of the cross section of the log, and the diameter dimension is always accurate. is obtained.

When the log W continues to advance and its tip reaches the position of the light emitter 73a and the light receiver 73b, the air cylinder 18 is pressurized in the direction in which the presser roller 12 closes, and the end of the log W reaches the position of the light emitter 70a and the light receiver 73b. The air cylinder 17 is operated so that the presser arm 11 is opened when it passes the position of the container 70b, and similarly the presser roller 12 is opened when the end of the log W passes the light emitter 73a and the light receiver 73b.

On the other hand, as the presser roller 11 presses the log W, the presser roller 11 rotates as the log advances, the gear 20 interlocked with this rotates, and the proximity switch 23 activates the rotation of the presser roller 11. That is, a pulse signal corresponding to the traveling distance of the log W is generated.

This pulse signal is counted by an appropriate pulse counter circuit from the time when the leading end of the log W reaches the position of the light emitter 72a and the light receiver 72b until the rear end passes the position of the light emitter 70a and the light receiver 70b. By adding the traveling distance of the log W obtained from the counted value and the interval distance G between the light emitter 70a, the light receiver 70b, and the light emitter 72a, the light receiver 72b, a value corresponding to the length dimension of the log is obtained.

Further, from the time when the end portion of the log W passes the positions of the emitter 70a and the receiver 70b, the pulse signal generated by the proximity switch 23 is counted by a separately provided pulse counter circuit, and the counted value is calculated by the emitter 70a and the receiver 70b. When the position of the receiver 70b reaches a value corresponding to the distance J from the line H-H' shown in FIGS. 1 and 2, it is connected to the pulse generators 39 and 67. By reading and recording the counts of the pulse counter circuit, it is also possible to measure the diameter of the end portion of the log.

[Effects of the invention] Since this invention is configured as described above, it produces the effects described below.

The device for measuring sawn logs of this invention can measure the diameter of the end and head portions of the log individually and two-dimensionally, and simultaneously determine the length. By processing the values appropriately according to the purpose, accurate acceptance data such as the number and volume of logs can be automatically obtained even for a large amount of logs, and the system can also be used to sort and classify logs by diameter class and length. It can also be directly controlled, making it possible to highly accurately automate tasks such as inspection and sorting of logs, which previously had to be done manually, at businesses that handle large quantities of logs, such as lumber mills, chip manufacturers, and log markets. It has the expected effects of extremely large labor and energy savings.

[Brief explanation of the drawing]

The figures all show one embodiment of this invention; Fig. 1 is a front view of the measuring device, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, and Fig. 3 is the same as the one shown in Fig. 1. 4 is a cross-sectional view taken along the line B-B', and FIG. 4 is a configuration diagram of the main parts showing the relationship between the presser roller and the proximity switch.
FIG. 5 is a configuration diagram showing the relationship between the left and right measuring arm and the feed roller, FIG. 6 is a configuration diagram showing the relationship between the vertical measurement arm and the feed roller, and FIGS. 7 and 8 a- 3C is an explanatory diagram of the actual operating state for explaining the operation of this device. 1... Underframe, 4... Feed roller, 8... Electric motor, 9, 10... Bracket, 11, 12... Presser roller, 13, 14... Swing arm, 17, 1
8, 38, 57, 58...Air cylinder, 26
... Frame body, 28, 29, 48, 49 ... Shaft, 3
2, 33, 52, 53...Measuring arm, 34, 3
5... Sector gear, 39, 62, 67... Pulse generator, 70a, 70b to 73a, 73b...
...Photoelectric switch.

Claims (1)

[Scope of utility model registration request] A measuring device that measures the longitudinal size of an object to be measured by bringing a plurality of contacts into contact with the moving object. A plurality of feed rollers 4, 4 each receiving rotational force from an electric motor 8 and rotating in a predetermined direction;
Swing arms 13, 14 are located above the plurality of feed rollers 4, 4, have one end pivotally supported by brackets 9, 10 attached to the underframe 1, and are swingable by air cylinders 17, 18. Presser rollers 11 and 12 are pivotally supported at the ends and press the raw wood W against each of the feed rollers 4 and 4, and a frame is pivotally supported at the lower end and is swingably attached to the raw wood W feeding side of the underframe 1. body 26, one end of which is pivotally supported by shafts 28, 29 on this frame 26, mutually meshing sector gears 34, 35 attached to said shafts 28, 29 open and close symmetrically up and down with respect to said shaft. 28, 29
first measuring arms 32, 33 closed symmetrically to each other with an air cylinder 38 mounted between them;
One end of each of the shafts 48 and 49 is supported by the frame body 26, and when the shafts 48 and 49 are rotated in one direction, the shafts 48 and 49 open symmetrically to the left and right.
The second measuring arms 52, 5 close symmetrically to each other with air cylinders 57, 58 attached to the
3, which is arranged in the direction in which the feed rollers 4, 4 are lined up and operates the air cylinders 17, 18, 38, 57, 58, etc. according to the advancing position of the log W, and instructs to read the measurement value. photoelectric switches 70a, 70b to 73a, 73b, and the first
and second measurement arm 32, 33, 52, 53
A lumber log inspection device comprising pulse generators 39, 62, and 67 that generate pulse signals corresponding to opening/closing operations.